Sometimes, the similarities are not even about preferences. Couples may begin copying each other’s gestures, facial expressions, humour or ways of reacting to everyday situations. One person might develop the habit of making a particular expression, while the other starts doing the same thing during conversations.
These little similarities are often a natural part of spending time together. They do not mean couples lose their individuality. Rather, a relationship can gradually introduce two people to habits, interests and ways of doing things that become part of their shared everyday life.